Just kidding. Jack can't roll yet. (He has rolled over about five times, but it's not consistent enough to call it anything but a mere coincidence and case of being very, very upset with tummy time.)
And sorry for the excessive posts about Jack. But this is just too exciting, and since neither set of grandparents live nearby (700+ miles away) it's necessary to include everyone in on the excitement.
Look at the little guy go!